package com.heima.wemedia.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.conditions.query.LambdaQueryChainWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.file.service.FileStorageService;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.wemedia.dtos.WmMaterialDto;
import com.heima.model.wemedia.pojos.WmMaterial;
import com.heima.model.wemedia.pojos.WmNewsMaterial;
import com.heima.utils.thread.WmThreadLocalUtil;
import com.heima.wemedia.mapper.WmMaterialMapper;
import com.heima.wemedia.mapper.WmNewsMaterialMapper;
import com.heima.wemedia.service.WmMaterialService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.util.Date;
import java.util.UUID;


@Slf4j
@Service
@Transactional
public class WmMaterialServiceImpl extends ServiceImpl<WmMaterialMapper, WmMaterial> implements WmMaterialService {
    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private WmNewsMaterialMapper wmNewsMaterialMapper;

    /**
     * 素材图片上传
     *
     * @param multipartFile
     * @return
     */
    @Override
    public ResponseResult uploadPicture(MultipartFile multipartFile) {
        //检查参数
        if (multipartFile == null || multipartFile.getSize() == 0) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //上传图片到minio
        String fileName = UUID.randomUUID().toString().replace("-", "");
        String originalFilename = multipartFile.getOriginalFilename();
        String postfix = originalFilename.substring(originalFilename.lastIndexOf("."));
        String fileId = null;
        try {
            fileId = fileStorageService.uploadImgFile("", fileName + postfix, multipartFile.getInputStream());
            log.info("上传图片到minio中,fileId:{}", fileId);
        } catch (IOException e) {
            e.printStackTrace();
            log.error("WmMaterialServiceImpl-上传文件失败");
        }
        //保存到数据库
        WmMaterial wmMaterial = WmMaterial.builder()
                .userId(WmThreadLocalUtil.getUser().getId())
                .url(fileId)
                .isCollection((short) 0)
                .type((short) 0)
                .createdTime(new Date())
                .build();
        save(wmMaterial);


        //返回结果
        return ResponseResult.okResult(wmMaterial);
    }

    /**
     * 素材列表查询
     *
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findList(WmMaterialDto dto) {
        //检查参数
        dto.checkParam();
        //分页查询
        IPage page = new Page(dto.getPage(), dto.getSize());
        LambdaQueryWrapper<WmMaterial> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //是否收藏
        if (dto.getIsCollection() != null && dto.getIsCollection() == 1) {
            lambdaQueryWrapper.eq(WmMaterial::getIsCollection, dto.getIsCollection());
        }
        //按照用户查询
        lambdaQueryWrapper.eq(WmMaterial::getUserId, WmThreadLocalUtil.getUser().getId());
        //按照时间倒序
        lambdaQueryWrapper.orderByDesc(WmMaterial::getCreatedTime);

        page = page(page, lambdaQueryWrapper);
        //返回结果
        ResponseResult responseResult = new PageResponseResult(dto.getPage(), dto.getSize(), (int) page.getTotal());
        responseResult.setData(page.getRecords());
        return responseResult;
    }

    /**
     * 图片删除
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult delPicture(Integer id) {
        WmMaterial wmMaterial = getById(id);
        if (wmMaterial == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        if (wmMaterial.getUrl() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        WmNewsMaterial wmNewsMaterial = new WmNewsMaterial();
        wmNewsMaterial.setMaterialId(id);
        //根据素材图片id查找相关联的文章
        LambdaQueryWrapper<WmNewsMaterial> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(WmNewsMaterial::getMaterialId, id);
        Integer count = wmNewsMaterialMapper.selectCount(wrapper);
        //count>说明有文章用了该素材，不能删除
        if (count > 0) {
            return ResponseResult.errorResult(AppHttpCodeEnum.FILE_DELETE_FAILE);
        }
        //先删除minio里的素材
        fileStorageService.delete(wmMaterial.getUrl());
        //删除数据库的素材
        removeById(id);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 素材收藏
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult collect(Integer id) {
        WmMaterial wmMaterial = getById(id);
        if(wmMaterial.getIsCollection()==1){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        wmMaterial.setIsCollection((short)1);
        updateById(wmMaterial);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

    /**
     * 素材收藏取消
     *
     * @param id
     * @return
     */
    @Override
    public ResponseResult cancelCollect(Integer id) {
        WmMaterial wmMaterial = getById(id);
        if(wmMaterial.getIsCollection()==0){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        wmMaterial.setIsCollection((short)0);
        updateById(wmMaterial);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
